Ontario
Marathon Calendar Ontario 2026-2027
Monthly updates for Ontario
Get new running races (and updates) in your inbox every month.
Explore the best marathons in Ontario for 2026-2027! Our updated list features 11 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!
October 2026
February 2027
Monthly updates for Ontario
Get new running races (and updates) in your inbox every month.
June 2027
August 2027
October 2027